CVE-2025-64506

MEDIUM

6.1

Description

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From version 1.6.0 to before 1.6.51, a heap buffer over-read vulnerability exists in libpng's png_write_image_8bit function when processing 8-bit images through the simplified write API with convert_to_8bit enabled. The vulnerability affects 8-bit grayscale+alpha, RGB/RGBA, and images with incomplete row data. A conditional guard incorrectly allows 8-bit input to enter code expecting 16-bit input, causing reads up to 2 bytes beyond allocated buffer boundaries. This issue has been patched in version 1.6.51.

CVE Details

CVSS v3.1 Score6.1

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

Attack VectorLOCAL

ComplexityLOW

Privileges RequiredNONE

User InteractionREQUIRED

Published11/25/2025

Last Modified11/26/2025

Sourcenvd

Honeypot Sightings0

Affected Products

libpng:libpng

Weaknesses (CWE)

CWE-125

References

https://github.com/pnggroup/libpng/commit/2bd84c019c300b78e811743fbcddb67c9d9bf821(security-advisories@github.com)

https://github.com/pnggroup/libpng/pull/749(security-advisories@github.com)

https://github.com/pnggroup/libpng/security/advisories/GHSA-qpr4-xm66-hww6(security-advisories@github.com)

IOC Correlations

No correlations recorded

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